Political Essay On The Kingdom Of New Spain, Volume 4
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Letters of Alexander Von Humboldt
Written Between the Years 1827 and 1858, to Varnhagen Von Ense; Together with Extracts from Varnhagen's Diaries, and Letters from Varnhagen and Others to Hum... »

Essai Politique Sur L'Ï¿½Le De Cuba
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Letter Of Alexander Von Humboldt Written
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Cosmos: Sketch Of A Physical Description
Sketch of a Physical Description of the Universe, Volume 1 »

Personal Narrative Of Travels To The Equinoctial Regions Of The New Continent, During The Years 1799-1804 (volume 6, Pt. 1 ); By Atexander De Humboldt
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Tableaux de La Nature; Ou, Considerations Sur Les Dserts, Su
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Cosmos: A Survey Of The General Physical
A Survey of the General Physical History of the Universe »

Mineralogische Beobachtungen Ber Einige Basalte Am Rhein
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Cosmos: a Sketch of a Physical Description of the Universe, Volume 5
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